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USB: usbtest: use URB_ZERO_PACKET for BULK-OUT transfers 

Executing
| testusb -a -c 1 -t 3 -v 421 -s 2048

does not complete on the gadget side.
g_zero enqueues a 4096 bytes long buffer. The host sends 2048bytes which
is a multiple of wMaxPacketSize (either 64 or 512 bytes). The host is
done with sending data but the gadget waits for more.
Since the protocol does not include transfer-length-field sending a
terminating zero packet seems the only way out.

Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sebastian Andrzej Siewior 2011-08-23 10:44:54 +02:00 committed by Greg Kroah-Hartman
parent 39eb4ed556
commit 7c79d09435
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/misc/usbtest.c
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@ -359,8 +359,10 @@ static int simple_io(
urb->context = &completion;
while (retval == 0 && iterations-- > 0) {
init_completion(&completion);
if (usb_pipeout(urb->pipe))
if (usb_pipeout(urb->pipe)) {
simple_fill_buf(urb);
urb->transfer_flags |= URB_ZERO_PACKET;
}
retval = usb_submit_urb(urb, GFP_KERNEL);
if (retval != 0)
break;